The chemistry of nickel and vanadyl porphyrins

Conference · Tue Apr 01 04:00:00 EST 1986 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:5399732

Quirke, J M.E.; Martinez, Z C

Geoporphyrins occur as mixtures of skeletal types throughout the geosphere. Although nearly all metals may be successfully chelated by porphyrins in vitro, only two metal complexes - the nickel and vanadyl - are predominant in crude oils and oil shales. The distributions of the nickel and vadadyl geoporphyrins from the same sample are usually markedly different. Such differences may be attributed to one of two factors: a) Preferential chelation of one of the two metals by different geoporphyrin species. b) The different chemistry of the nickel and vanadyl porphyrin complexes gave rise to the variation in the distributions. The results of a series of competitive metallation studies are presented, and their role in the preferential chelation of the geoporphyrins is discussed. The reactivity of the nickel and vanadyl porphyrins at both the ..beta..- and meso (bridge) positions is described, and their significance in the analysis of geoporphyrin mixtures is outlined.

• Research Organization: Dept. of Chemistry, Florida International Univ., Tamiami Trail, Miami, FL 33199
• OSTI ID: 5399732
• Report Number(s): CONF-860425-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 31:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
04 OIL SHALES AND TAR SANDS
040500 -- Oil Shales & Tar Sands-- Properties & Composition
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHELATES
CHEMICAL COMPOSITION
CHEMISTRY
COMPLEXES
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GEOCHEMISTRY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
INFORMATION
MATERIALS
NICKEL COMPLEXES
NUMERICAL DATA
OIL SHALES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM
PORPHYRINS
TRANSITION ELEMENT COMPLEXES
VANADIUM COMPLEXES